forked from OSchip/llvm-project
1088 lines
45 KiB
C++
1088 lines
45 KiB
C++
//===--- SanitizerArgs.cpp - Arguments for sanitizer tools ---------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Driver/SanitizerArgs.h"
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#include "ToolChains/CommonArgs.h"
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#include "clang/Basic/Sanitizers.h"
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#include "clang/Driver/Driver.h"
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#include "clang/Driver/DriverDiagnostic.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/ToolChain.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/SpecialCaseList.h"
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#include "llvm/Support/TargetParser.h"
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#include <memory>
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using namespace clang;
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using namespace clang::driver;
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using namespace llvm::opt;
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static const SanitizerMask NeedsUbsanRt =
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SanitizerKind::Undefined | SanitizerKind::Integer |
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SanitizerKind::ImplicitConversion | SanitizerKind::Nullability |
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SanitizerKind::CFI;
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static const SanitizerMask NeedsUbsanCxxRt =
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SanitizerKind::Vptr | SanitizerKind::CFI;
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static const SanitizerMask NotAllowedWithTrap = SanitizerKind::Vptr;
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static const SanitizerMask NotAllowedWithMinimalRuntime = SanitizerKind::Vptr;
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static const SanitizerMask RequiresPIE =
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SanitizerKind::DataFlow | SanitizerKind::HWAddress | SanitizerKind::Scudo;
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static const SanitizerMask NeedsUnwindTables =
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SanitizerKind::Address | SanitizerKind::HWAddress | SanitizerKind::Thread |
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SanitizerKind::Memory | SanitizerKind::DataFlow;
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static const SanitizerMask SupportsCoverage =
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SanitizerKind::Address | SanitizerKind::HWAddress |
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SanitizerKind::KernelAddress | SanitizerKind::KernelHWAddress |
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SanitizerKind::Memory | SanitizerKind::KernelMemory | SanitizerKind::Leak |
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SanitizerKind::Undefined | SanitizerKind::Integer |
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SanitizerKind::ImplicitConversion | SanitizerKind::Nullability |
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SanitizerKind::DataFlow | SanitizerKind::Fuzzer |
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SanitizerKind::FuzzerNoLink;
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static const SanitizerMask RecoverableByDefault =
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SanitizerKind::Undefined | SanitizerKind::Integer |
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SanitizerKind::ImplicitConversion | SanitizerKind::Nullability;
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static const SanitizerMask Unrecoverable =
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SanitizerKind::Unreachable | SanitizerKind::Return;
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static const SanitizerMask AlwaysRecoverable =
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SanitizerKind::KernelAddress | SanitizerKind::KernelHWAddress;
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static const SanitizerMask LegacyFsanitizeRecoverMask =
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SanitizerKind::Undefined | SanitizerKind::Integer;
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static const SanitizerMask NeedsLTO = SanitizerKind::CFI;
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static const SanitizerMask TrappingSupported =
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(SanitizerKind::Undefined & ~SanitizerKind::Vptr) |
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SanitizerKind::UnsignedIntegerOverflow | SanitizerKind::ImplicitConversion |
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SanitizerKind::Nullability | SanitizerKind::LocalBounds |
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SanitizerKind::CFI;
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static const SanitizerMask TrappingDefault = SanitizerKind::CFI;
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static const SanitizerMask CFIClasses =
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SanitizerKind::CFIVCall | SanitizerKind::CFINVCall |
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SanitizerKind::CFIMFCall | SanitizerKind::CFIDerivedCast |
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SanitizerKind::CFIUnrelatedCast;
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static const SanitizerMask CompatibleWithMinimalRuntime =
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TrappingSupported | SanitizerKind::Scudo | SanitizerKind::ShadowCallStack;
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enum CoverageFeature {
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CoverageFunc = 1 << 0,
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CoverageBB = 1 << 1,
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CoverageEdge = 1 << 2,
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CoverageIndirCall = 1 << 3,
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CoverageTraceBB = 1 << 4, // Deprecated.
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CoverageTraceCmp = 1 << 5,
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CoverageTraceDiv = 1 << 6,
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CoverageTraceGep = 1 << 7,
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Coverage8bitCounters = 1 << 8, // Deprecated.
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CoverageTracePC = 1 << 9,
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CoverageTracePCGuard = 1 << 10,
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CoverageNoPrune = 1 << 11,
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CoverageInline8bitCounters = 1 << 12,
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CoveragePCTable = 1 << 13,
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CoverageStackDepth = 1 << 14,
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};
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/// Parse a -fsanitize= or -fno-sanitize= argument's values, diagnosing any
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/// invalid components. Returns a SanitizerMask.
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static SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
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bool DiagnoseErrors);
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/// Parse -f(no-)?sanitize-coverage= flag values, diagnosing any invalid
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/// components. Returns OR of members of \c CoverageFeature enumeration.
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static int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A);
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/// Produce an argument string from ArgList \p Args, which shows how it
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/// provides some sanitizer kind from \p Mask. For example, the argument list
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/// "-fsanitize=thread,vptr -fsanitize=address" with mask \c NeedsUbsanRt
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/// would produce "-fsanitize=vptr".
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static std::string lastArgumentForMask(const Driver &D,
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const llvm::opt::ArgList &Args,
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SanitizerMask Mask);
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/// Produce an argument string from argument \p A, which shows how it provides
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/// a value in \p Mask. For instance, the argument
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/// "-fsanitize=address,alignment" with mask \c NeedsUbsanRt would produce
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/// "-fsanitize=alignment".
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static std::string describeSanitizeArg(const llvm::opt::Arg *A,
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SanitizerMask Mask);
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/// Produce a string containing comma-separated names of sanitizers in \p
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/// Sanitizers set.
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static std::string toString(const clang::SanitizerSet &Sanitizers);
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static void addDefaultBlacklists(const Driver &D, SanitizerMask Kinds,
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std::vector<std::string> &BlacklistFiles) {
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struct Blacklist {
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const char *File;
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SanitizerMask Mask;
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} Blacklists[] = {{"asan_blacklist.txt", SanitizerKind::Address},
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{"hwasan_blacklist.txt", SanitizerKind::HWAddress},
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{"msan_blacklist.txt", SanitizerKind::Memory},
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{"tsan_blacklist.txt", SanitizerKind::Thread},
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{"dfsan_abilist.txt", SanitizerKind::DataFlow},
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{"cfi_blacklist.txt", SanitizerKind::CFI},
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{"ubsan_blacklist.txt", SanitizerKind::Undefined |
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SanitizerKind::Integer |
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SanitizerKind::Nullability}};
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for (auto BL : Blacklists) {
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if (!(Kinds & BL.Mask))
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continue;
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clang::SmallString<64> Path(D.ResourceDir);
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llvm::sys::path::append(Path, "share", BL.File);
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if (llvm::sys::fs::exists(Path))
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BlacklistFiles.push_back(Path.str());
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else if (BL.Mask == SanitizerKind::CFI)
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// If cfi_blacklist.txt cannot be found in the resource dir, driver
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// should fail.
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D.Diag(clang::diag::err_drv_no_such_file) << Path;
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}
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}
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/// Sets group bits for every group that has at least one representative already
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/// enabled in \p Kinds.
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static SanitizerMask setGroupBits(SanitizerMask Kinds) {
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#define SANITIZER(NAME, ID)
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#define SANITIZER_GROUP(NAME, ID, ALIAS) \
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if (Kinds & SanitizerKind::ID) \
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Kinds |= SanitizerKind::ID##Group;
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#include "clang/Basic/Sanitizers.def"
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return Kinds;
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}
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static SanitizerMask parseSanitizeTrapArgs(const Driver &D,
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const llvm::opt::ArgList &Args) {
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SanitizerMask TrapRemove; // During the loop below, the accumulated set of
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// sanitizers disabled by the current sanitizer
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// argument or any argument after it.
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SanitizerMask TrappingKinds;
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SanitizerMask TrappingSupportedWithGroups = setGroupBits(TrappingSupported);
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for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
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I != E; ++I) {
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const auto *Arg = *I;
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if (Arg->getOption().matches(options::OPT_fsanitize_trap_EQ)) {
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Arg->claim();
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SanitizerMask Add = parseArgValues(D, Arg, true);
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Add &= ~TrapRemove;
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if (SanitizerMask InvalidValues = Add & ~TrappingSupportedWithGroups) {
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SanitizerSet S;
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S.Mask = InvalidValues;
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D.Diag(diag::err_drv_unsupported_option_argument) << "-fsanitize-trap"
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<< toString(S);
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}
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TrappingKinds |= expandSanitizerGroups(Add) & ~TrapRemove;
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} else if (Arg->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) {
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Arg->claim();
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TrapRemove |= expandSanitizerGroups(parseArgValues(D, Arg, true));
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} else if (Arg->getOption().matches(
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options::OPT_fsanitize_undefined_trap_on_error)) {
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Arg->claim();
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TrappingKinds |=
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expandSanitizerGroups(SanitizerKind::UndefinedGroup & ~TrapRemove) &
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~TrapRemove;
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} else if (Arg->getOption().matches(
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options::OPT_fno_sanitize_undefined_trap_on_error)) {
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Arg->claim();
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TrapRemove |= expandSanitizerGroups(SanitizerKind::UndefinedGroup);
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}
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}
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// Apply default trapping behavior.
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TrappingKinds |= TrappingDefault & ~TrapRemove;
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return TrappingKinds;
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}
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bool SanitizerArgs::needsUbsanRt() const {
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// All of these include ubsan.
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if (needsAsanRt() || needsMsanRt() || needsHwasanRt() || needsTsanRt() ||
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needsDfsanRt() || needsLsanRt() || needsCfiDiagRt() ||
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(needsScudoRt() && !requiresMinimalRuntime()))
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return false;
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return (Sanitizers.Mask & NeedsUbsanRt & ~TrapSanitizers.Mask) ||
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CoverageFeatures;
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}
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bool SanitizerArgs::needsCfiRt() const {
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return !(Sanitizers.Mask & SanitizerKind::CFI & ~TrapSanitizers.Mask) &&
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CfiCrossDso && !ImplicitCfiRuntime;
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}
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bool SanitizerArgs::needsCfiDiagRt() const {
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return (Sanitizers.Mask & SanitizerKind::CFI & ~TrapSanitizers.Mask) &&
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CfiCrossDso && !ImplicitCfiRuntime;
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}
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bool SanitizerArgs::requiresPIE() const {
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return NeedPIE || (Sanitizers.Mask & RequiresPIE);
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}
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bool SanitizerArgs::needsUnwindTables() const {
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return static_cast<bool>(Sanitizers.Mask & NeedsUnwindTables);
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}
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bool SanitizerArgs::needsLTO() const {
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return static_cast<bool>(Sanitizers.Mask & NeedsLTO);
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}
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SanitizerArgs::SanitizerArgs(const ToolChain &TC,
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const llvm::opt::ArgList &Args) {
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SanitizerMask AllRemove; // During the loop below, the accumulated set of
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// sanitizers disabled by the current sanitizer
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// argument or any argument after it.
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SanitizerMask AllAddedKinds; // Mask of all sanitizers ever enabled by
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// -fsanitize= flags (directly or via group
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// expansion), some of which may be disabled
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// later. Used to carefully prune
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// unused-argument diagnostics.
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SanitizerMask DiagnosedKinds; // All Kinds we have diagnosed up to now.
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// Used to deduplicate diagnostics.
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SanitizerMask Kinds;
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const SanitizerMask Supported = setGroupBits(TC.getSupportedSanitizers());
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CfiCrossDso = Args.hasFlag(options::OPT_fsanitize_cfi_cross_dso,
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options::OPT_fno_sanitize_cfi_cross_dso, false);
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ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
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const Driver &D = TC.getDriver();
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SanitizerMask TrappingKinds = parseSanitizeTrapArgs(D, Args);
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SanitizerMask InvalidTrappingKinds = TrappingKinds & NotAllowedWithTrap;
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MinimalRuntime =
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Args.hasFlag(options::OPT_fsanitize_minimal_runtime,
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options::OPT_fno_sanitize_minimal_runtime, MinimalRuntime);
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// The object size sanitizer should not be enabled at -O0.
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Arg *OptLevel = Args.getLastArg(options::OPT_O_Group);
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bool RemoveObjectSizeAtO0 =
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!OptLevel || OptLevel->getOption().matches(options::OPT_O0);
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for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
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I != E; ++I) {
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const auto *Arg = *I;
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if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
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Arg->claim();
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SanitizerMask Add = parseArgValues(D, Arg, /*AllowGroups=*/true);
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if (RemoveObjectSizeAtO0) {
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AllRemove |= SanitizerKind::ObjectSize;
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// The user explicitly enabled the object size sanitizer. Warn
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// that this does nothing at -O0.
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if (Add & SanitizerKind::ObjectSize)
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D.Diag(diag::warn_drv_object_size_disabled_O0)
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<< Arg->getAsString(Args);
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}
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AllAddedKinds |= expandSanitizerGroups(Add);
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// Avoid diagnosing any sanitizer which is disabled later.
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Add &= ~AllRemove;
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// At this point we have not expanded groups, so any unsupported
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// sanitizers in Add are those which have been explicitly enabled.
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// Diagnose them.
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if (SanitizerMask KindsToDiagnose =
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Add & InvalidTrappingKinds & ~DiagnosedKinds) {
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std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
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D.Diag(diag::err_drv_argument_not_allowed_with)
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<< Desc << "-fsanitize-trap=undefined";
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DiagnosedKinds |= KindsToDiagnose;
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}
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Add &= ~InvalidTrappingKinds;
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if (MinimalRuntime) {
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if (SanitizerMask KindsToDiagnose =
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Add & NotAllowedWithMinimalRuntime & ~DiagnosedKinds) {
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std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
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D.Diag(diag::err_drv_argument_not_allowed_with)
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<< Desc << "-fsanitize-minimal-runtime";
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DiagnosedKinds |= KindsToDiagnose;
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}
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Add &= ~NotAllowedWithMinimalRuntime;
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}
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// FIXME: Make CFI on member function calls compatible with cross-DSO CFI.
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// There are currently two problems:
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// - Virtual function call checks need to pass a pointer to the function
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// address to llvm.type.test and a pointer to the address point to the
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// diagnostic function. Currently we pass the same pointer to both
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// places.
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// - Non-virtual function call checks may need to check multiple type
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// identifiers.
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// Fixing both of those may require changes to the cross-DSO CFI
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// interface.
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if (CfiCrossDso && (Add & SanitizerKind::CFIMFCall & ~DiagnosedKinds)) {
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D.Diag(diag::err_drv_argument_not_allowed_with)
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<< "-fsanitize=cfi-mfcall"
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<< "-fsanitize-cfi-cross-dso";
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Add &= ~SanitizerKind::CFIMFCall;
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DiagnosedKinds |= SanitizerKind::CFIMFCall;
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}
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if (SanitizerMask KindsToDiagnose = Add & ~Supported & ~DiagnosedKinds) {
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std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
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D.Diag(diag::err_drv_unsupported_opt_for_target)
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<< Desc << TC.getTriple().str();
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DiagnosedKinds |= KindsToDiagnose;
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}
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Add &= Supported;
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// Test for -fno-rtti + explicit -fsanitizer=vptr before expanding groups
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// so we don't error out if -fno-rtti and -fsanitize=undefined were
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// passed.
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if ((Add & SanitizerKind::Vptr) && (RTTIMode == ToolChain::RM_Disabled)) {
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if (const llvm::opt::Arg *NoRTTIArg = TC.getRTTIArg()) {
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assert(NoRTTIArg->getOption().matches(options::OPT_fno_rtti) &&
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"RTTI disabled without -fno-rtti option?");
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// The user explicitly passed -fno-rtti with -fsanitize=vptr, but
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// the vptr sanitizer requires RTTI, so this is a user error.
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D.Diag(diag::err_drv_argument_not_allowed_with)
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<< "-fsanitize=vptr" << NoRTTIArg->getAsString(Args);
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} else {
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// The vptr sanitizer requires RTTI, but RTTI is disabled (by
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// default). Warn that the vptr sanitizer is being disabled.
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D.Diag(diag::warn_drv_disabling_vptr_no_rtti_default);
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}
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// Take out the Vptr sanitizer from the enabled sanitizers
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AllRemove |= SanitizerKind::Vptr;
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}
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Add = expandSanitizerGroups(Add);
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// Group expansion may have enabled a sanitizer which is disabled later.
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Add &= ~AllRemove;
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// Silently discard any unsupported sanitizers implicitly enabled through
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// group expansion.
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Add &= ~InvalidTrappingKinds;
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if (MinimalRuntime) {
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Add &= ~NotAllowedWithMinimalRuntime;
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}
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if (CfiCrossDso)
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Add &= ~SanitizerKind::CFIMFCall;
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Add &= Supported;
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if (Add & SanitizerKind::Fuzzer)
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Add |= SanitizerKind::FuzzerNoLink;
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// Enable coverage if the fuzzing flag is set.
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if (Add & SanitizerKind::FuzzerNoLink) {
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CoverageFeatures |= CoverageInline8bitCounters | CoverageIndirCall |
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CoverageTraceCmp | CoveragePCTable;
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// Due to TLS differences, stack depth tracking is only enabled on Linux
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if (TC.getTriple().isOSLinux())
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CoverageFeatures |= CoverageStackDepth;
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}
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Kinds |= Add;
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} else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
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Arg->claim();
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SanitizerMask Remove = parseArgValues(D, Arg, true);
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AllRemove |= expandSanitizerGroups(Remove);
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}
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}
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std::pair<SanitizerMask, SanitizerMask> IncompatibleGroups[] = {
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std::make_pair(SanitizerKind::Address,
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SanitizerKind::Thread | SanitizerKind::Memory),
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std::make_pair(SanitizerKind::Thread, SanitizerKind::Memory),
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std::make_pair(SanitizerKind::Leak,
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SanitizerKind::Thread | SanitizerKind::Memory),
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std::make_pair(SanitizerKind::KernelAddress,
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SanitizerKind::Address | SanitizerKind::Leak |
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SanitizerKind::Thread | SanitizerKind::Memory),
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std::make_pair(SanitizerKind::HWAddress,
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SanitizerKind::Address | SanitizerKind::Thread |
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SanitizerKind::Memory | SanitizerKind::KernelAddress),
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std::make_pair(SanitizerKind::Scudo,
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SanitizerKind::Address | SanitizerKind::HWAddress |
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SanitizerKind::Leak | SanitizerKind::Thread |
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SanitizerKind::Memory | SanitizerKind::KernelAddress),
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std::make_pair(SanitizerKind::SafeStack,
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SanitizerKind::Address | SanitizerKind::HWAddress |
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SanitizerKind::Leak | SanitizerKind::Thread |
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SanitizerKind::Memory | SanitizerKind::KernelAddress),
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std::make_pair(SanitizerKind::KernelHWAddress,
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SanitizerKind::Address | SanitizerKind::HWAddress |
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SanitizerKind::Leak | SanitizerKind::Thread |
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SanitizerKind::Memory | SanitizerKind::KernelAddress |
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SanitizerKind::SafeStack),
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std::make_pair(SanitizerKind::KernelMemory,
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SanitizerKind::Address | SanitizerKind::HWAddress |
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SanitizerKind::Leak | SanitizerKind::Thread |
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SanitizerKind::Memory | SanitizerKind::KernelAddress |
|
|
SanitizerKind::Scudo | SanitizerKind::SafeStack)};
|
|
// Enable toolchain specific default sanitizers if not explicitly disabled.
|
|
SanitizerMask Default = TC.getDefaultSanitizers() & ~AllRemove;
|
|
|
|
// Disable default sanitizers that are incompatible with explicitly requested
|
|
// ones.
|
|
for (auto G : IncompatibleGroups) {
|
|
SanitizerMask Group = G.first;
|
|
if ((Default & Group) && (Kinds & G.second))
|
|
Default &= ~Group;
|
|
}
|
|
|
|
Kinds |= Default;
|
|
|
|
// We disable the vptr sanitizer if it was enabled by group expansion but RTTI
|
|
// is disabled.
|
|
if ((Kinds & SanitizerKind::Vptr) && (RTTIMode == ToolChain::RM_Disabled)) {
|
|
Kinds &= ~SanitizerKind::Vptr;
|
|
}
|
|
|
|
// Check that LTO is enabled if we need it.
|
|
if ((Kinds & NeedsLTO) && !D.isUsingLTO()) {
|
|
D.Diag(diag::err_drv_argument_only_allowed_with)
|
|
<< lastArgumentForMask(D, Args, Kinds & NeedsLTO) << "-flto";
|
|
}
|
|
|
|
if ((Kinds & SanitizerKind::ShadowCallStack) &&
|
|
TC.getTriple().getArch() == llvm::Triple::aarch64 &&
|
|
!llvm::AArch64::isX18ReservedByDefault(TC.getTriple()) &&
|
|
!Args.hasArg(options::OPT_ffixed_x18)) {
|
|
D.Diag(diag::err_drv_argument_only_allowed_with)
|
|
<< lastArgumentForMask(D, Args, Kinds & SanitizerKind::ShadowCallStack)
|
|
<< "-ffixed-x18";
|
|
}
|
|
|
|
// Report error if there are non-trapping sanitizers that require
|
|
// c++abi-specific parts of UBSan runtime, and they are not provided by the
|
|
// toolchain. We don't have a good way to check the latter, so we just
|
|
// check if the toolchan supports vptr.
|
|
if (~Supported & SanitizerKind::Vptr) {
|
|
SanitizerMask KindsToDiagnose = Kinds & ~TrappingKinds & NeedsUbsanCxxRt;
|
|
// The runtime library supports the Microsoft C++ ABI, but only well enough
|
|
// for CFI. FIXME: Remove this once we support vptr on Windows.
|
|
if (TC.getTriple().isOSWindows())
|
|
KindsToDiagnose &= ~SanitizerKind::CFI;
|
|
if (KindsToDiagnose) {
|
|
SanitizerSet S;
|
|
S.Mask = KindsToDiagnose;
|
|
D.Diag(diag::err_drv_unsupported_opt_for_target)
|
|
<< ("-fno-sanitize-trap=" + toString(S)) << TC.getTriple().str();
|
|
Kinds &= ~KindsToDiagnose;
|
|
}
|
|
}
|
|
|
|
// Warn about incompatible groups of sanitizers.
|
|
for (auto G : IncompatibleGroups) {
|
|
SanitizerMask Group = G.first;
|
|
if (Kinds & Group) {
|
|
if (SanitizerMask Incompatible = Kinds & G.second) {
|
|
D.Diag(clang::diag::err_drv_argument_not_allowed_with)
|
|
<< lastArgumentForMask(D, Args, Group)
|
|
<< lastArgumentForMask(D, Args, Incompatible);
|
|
Kinds &= ~Incompatible;
|
|
}
|
|
}
|
|
}
|
|
// FIXME: Currently -fsanitize=leak is silently ignored in the presence of
|
|
// -fsanitize=address. Perhaps it should print an error, or perhaps
|
|
// -f(-no)sanitize=leak should change whether leak detection is enabled by
|
|
// default in ASan?
|
|
|
|
// Parse -f(no-)?sanitize-recover flags.
|
|
SanitizerMask RecoverableKinds = RecoverableByDefault | AlwaysRecoverable;
|
|
SanitizerMask DiagnosedUnrecoverableKinds;
|
|
SanitizerMask DiagnosedAlwaysRecoverableKinds;
|
|
for (const auto *Arg : Args) {
|
|
const char *DeprecatedReplacement = nullptr;
|
|
if (Arg->getOption().matches(options::OPT_fsanitize_recover)) {
|
|
DeprecatedReplacement =
|
|
"-fsanitize-recover=undefined,integer' or '-fsanitize-recover=all";
|
|
RecoverableKinds |= expandSanitizerGroups(LegacyFsanitizeRecoverMask);
|
|
Arg->claim();
|
|
} else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover)) {
|
|
DeprecatedReplacement = "-fno-sanitize-recover=undefined,integer' or "
|
|
"'-fno-sanitize-recover=all";
|
|
RecoverableKinds &= ~expandSanitizerGroups(LegacyFsanitizeRecoverMask);
|
|
Arg->claim();
|
|
} else if (Arg->getOption().matches(options::OPT_fsanitize_recover_EQ)) {
|
|
SanitizerMask Add = parseArgValues(D, Arg, true);
|
|
// Report error if user explicitly tries to recover from unrecoverable
|
|
// sanitizer.
|
|
if (SanitizerMask KindsToDiagnose =
|
|
Add & Unrecoverable & ~DiagnosedUnrecoverableKinds) {
|
|
SanitizerSet SetToDiagnose;
|
|
SetToDiagnose.Mask |= KindsToDiagnose;
|
|
D.Diag(diag::err_drv_unsupported_option_argument)
|
|
<< Arg->getOption().getName() << toString(SetToDiagnose);
|
|
DiagnosedUnrecoverableKinds |= KindsToDiagnose;
|
|
}
|
|
RecoverableKinds |= expandSanitizerGroups(Add);
|
|
Arg->claim();
|
|
} else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover_EQ)) {
|
|
SanitizerMask Remove = parseArgValues(D, Arg, true);
|
|
// Report error if user explicitly tries to disable recovery from
|
|
// always recoverable sanitizer.
|
|
if (SanitizerMask KindsToDiagnose =
|
|
Remove & AlwaysRecoverable & ~DiagnosedAlwaysRecoverableKinds) {
|
|
SanitizerSet SetToDiagnose;
|
|
SetToDiagnose.Mask |= KindsToDiagnose;
|
|
D.Diag(diag::err_drv_unsupported_option_argument)
|
|
<< Arg->getOption().getName() << toString(SetToDiagnose);
|
|
DiagnosedAlwaysRecoverableKinds |= KindsToDiagnose;
|
|
}
|
|
RecoverableKinds &= ~expandSanitizerGroups(Remove);
|
|
Arg->claim();
|
|
}
|
|
if (DeprecatedReplacement) {
|
|
D.Diag(diag::warn_drv_deprecated_arg) << Arg->getAsString(Args)
|
|
<< DeprecatedReplacement;
|
|
}
|
|
}
|
|
RecoverableKinds &= Kinds;
|
|
RecoverableKinds &= ~Unrecoverable;
|
|
|
|
TrappingKinds &= Kinds;
|
|
RecoverableKinds &= ~TrappingKinds;
|
|
|
|
// Setup blacklist files.
|
|
// Add default blacklist from resource directory.
|
|
addDefaultBlacklists(D, Kinds, BlacklistFiles);
|
|
// Parse -f(no-)sanitize-blacklist options.
|
|
for (const auto *Arg : Args) {
|
|
if (Arg->getOption().matches(options::OPT_fsanitize_blacklist)) {
|
|
Arg->claim();
|
|
std::string BLPath = Arg->getValue();
|
|
if (llvm::sys::fs::exists(BLPath)) {
|
|
BlacklistFiles.push_back(BLPath);
|
|
ExtraDeps.push_back(BLPath);
|
|
} else {
|
|
D.Diag(clang::diag::err_drv_no_such_file) << BLPath;
|
|
}
|
|
} else if (Arg->getOption().matches(options::OPT_fno_sanitize_blacklist)) {
|
|
Arg->claim();
|
|
BlacklistFiles.clear();
|
|
ExtraDeps.clear();
|
|
}
|
|
}
|
|
// Validate blacklists format.
|
|
{
|
|
std::string BLError;
|
|
std::unique_ptr<llvm::SpecialCaseList> SCL(
|
|
llvm::SpecialCaseList::create(BlacklistFiles, BLError));
|
|
if (!SCL.get())
|
|
D.Diag(clang::diag::err_drv_malformed_sanitizer_blacklist) << BLError;
|
|
}
|
|
|
|
// Parse -f[no-]sanitize-memory-track-origins[=level] options.
|
|
if (AllAddedKinds & SanitizerKind::Memory) {
|
|
if (Arg *A =
|
|
Args.getLastArg(options::OPT_fsanitize_memory_track_origins_EQ,
|
|
options::OPT_fsanitize_memory_track_origins,
|
|
options::OPT_fno_sanitize_memory_track_origins)) {
|
|
if (A->getOption().matches(options::OPT_fsanitize_memory_track_origins)) {
|
|
MsanTrackOrigins = 2;
|
|
} else if (A->getOption().matches(
|
|
options::OPT_fno_sanitize_memory_track_origins)) {
|
|
MsanTrackOrigins = 0;
|
|
} else {
|
|
StringRef S = A->getValue();
|
|
if (S.getAsInteger(0, MsanTrackOrigins) || MsanTrackOrigins < 0 ||
|
|
MsanTrackOrigins > 2) {
|
|
D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
|
|
}
|
|
}
|
|
}
|
|
MsanUseAfterDtor =
|
|
Args.hasFlag(options::OPT_fsanitize_memory_use_after_dtor,
|
|
options::OPT_fno_sanitize_memory_use_after_dtor,
|
|
MsanUseAfterDtor);
|
|
NeedPIE |= !(TC.getTriple().isOSLinux() &&
|
|
TC.getTriple().getArch() == llvm::Triple::x86_64);
|
|
} else {
|
|
MsanUseAfterDtor = false;
|
|
}
|
|
|
|
if (AllAddedKinds & SanitizerKind::Thread) {
|
|
TsanMemoryAccess = Args.hasFlag(
|
|
options::OPT_fsanitize_thread_memory_access,
|
|
options::OPT_fno_sanitize_thread_memory_access, TsanMemoryAccess);
|
|
TsanFuncEntryExit = Args.hasFlag(
|
|
options::OPT_fsanitize_thread_func_entry_exit,
|
|
options::OPT_fno_sanitize_thread_func_entry_exit, TsanFuncEntryExit);
|
|
TsanAtomics =
|
|
Args.hasFlag(options::OPT_fsanitize_thread_atomics,
|
|
options::OPT_fno_sanitize_thread_atomics, TsanAtomics);
|
|
}
|
|
|
|
if (AllAddedKinds & SanitizerKind::CFI) {
|
|
// Without PIE, external function address may resolve to a PLT record, which
|
|
// can not be verified by the target module.
|
|
NeedPIE |= CfiCrossDso;
|
|
CfiICallGeneralizePointers =
|
|
Args.hasArg(options::OPT_fsanitize_cfi_icall_generalize_pointers);
|
|
|
|
if (CfiCrossDso && CfiICallGeneralizePointers)
|
|
D.Diag(diag::err_drv_argument_not_allowed_with)
|
|
<< "-fsanitize-cfi-cross-dso"
|
|
<< "-fsanitize-cfi-icall-generalize-pointers";
|
|
}
|
|
|
|
Stats = Args.hasFlag(options::OPT_fsanitize_stats,
|
|
options::OPT_fno_sanitize_stats, false);
|
|
|
|
if (MinimalRuntime) {
|
|
SanitizerMask IncompatibleMask =
|
|
Kinds & ~setGroupBits(CompatibleWithMinimalRuntime);
|
|
if (IncompatibleMask)
|
|
D.Diag(clang::diag::err_drv_argument_not_allowed_with)
|
|
<< "-fsanitize-minimal-runtime"
|
|
<< lastArgumentForMask(D, Args, IncompatibleMask);
|
|
|
|
SanitizerMask NonTrappingCfi = Kinds & SanitizerKind::CFI & ~TrappingKinds;
|
|
if (NonTrappingCfi)
|
|
D.Diag(clang::diag::err_drv_argument_only_allowed_with)
|
|
<< "fsanitize-minimal-runtime"
|
|
<< "fsanitize-trap=cfi";
|
|
}
|
|
|
|
// Parse -f(no-)?sanitize-coverage flags if coverage is supported by the
|
|
// enabled sanitizers.
|
|
for (const auto *Arg : Args) {
|
|
if (Arg->getOption().matches(options::OPT_fsanitize_coverage)) {
|
|
int LegacySanitizeCoverage;
|
|
if (Arg->getNumValues() == 1 &&
|
|
!StringRef(Arg->getValue(0))
|
|
.getAsInteger(0, LegacySanitizeCoverage)) {
|
|
CoverageFeatures = 0;
|
|
Arg->claim();
|
|
if (LegacySanitizeCoverage != 0) {
|
|
D.Diag(diag::warn_drv_deprecated_arg)
|
|
<< Arg->getAsString(Args) << "-fsanitize-coverage=trace-pc-guard";
|
|
}
|
|
continue;
|
|
}
|
|
CoverageFeatures |= parseCoverageFeatures(D, Arg);
|
|
|
|
// Disable coverage and not claim the flags if there is at least one
|
|
// non-supporting sanitizer.
|
|
if (!(AllAddedKinds & ~AllRemove & ~setGroupBits(SupportsCoverage))) {
|
|
Arg->claim();
|
|
} else {
|
|
CoverageFeatures = 0;
|
|
}
|
|
} else if (Arg->getOption().matches(options::OPT_fno_sanitize_coverage)) {
|
|
Arg->claim();
|
|
CoverageFeatures &= ~parseCoverageFeatures(D, Arg);
|
|
}
|
|
}
|
|
// Choose at most one coverage type: function, bb, or edge.
|
|
if ((CoverageFeatures & CoverageFunc) && (CoverageFeatures & CoverageBB))
|
|
D.Diag(clang::diag::err_drv_argument_not_allowed_with)
|
|
<< "-fsanitize-coverage=func"
|
|
<< "-fsanitize-coverage=bb";
|
|
if ((CoverageFeatures & CoverageFunc) && (CoverageFeatures & CoverageEdge))
|
|
D.Diag(clang::diag::err_drv_argument_not_allowed_with)
|
|
<< "-fsanitize-coverage=func"
|
|
<< "-fsanitize-coverage=edge";
|
|
if ((CoverageFeatures & CoverageBB) && (CoverageFeatures & CoverageEdge))
|
|
D.Diag(clang::diag::err_drv_argument_not_allowed_with)
|
|
<< "-fsanitize-coverage=bb"
|
|
<< "-fsanitize-coverage=edge";
|
|
// Basic block tracing and 8-bit counters require some type of coverage
|
|
// enabled.
|
|
if (CoverageFeatures & CoverageTraceBB)
|
|
D.Diag(clang::diag::warn_drv_deprecated_arg)
|
|
<< "-fsanitize-coverage=trace-bb"
|
|
<< "-fsanitize-coverage=trace-pc-guard";
|
|
if (CoverageFeatures & Coverage8bitCounters)
|
|
D.Diag(clang::diag::warn_drv_deprecated_arg)
|
|
<< "-fsanitize-coverage=8bit-counters"
|
|
<< "-fsanitize-coverage=trace-pc-guard";
|
|
|
|
int InsertionPointTypes = CoverageFunc | CoverageBB | CoverageEdge;
|
|
int InstrumentationTypes =
|
|
CoverageTracePC | CoverageTracePCGuard | CoverageInline8bitCounters;
|
|
if ((CoverageFeatures & InsertionPointTypes) &&
|
|
!(CoverageFeatures & InstrumentationTypes)) {
|
|
D.Diag(clang::diag::warn_drv_deprecated_arg)
|
|
<< "-fsanitize-coverage=[func|bb|edge]"
|
|
<< "-fsanitize-coverage=[func|bb|edge],[trace-pc-guard|trace-pc]";
|
|
}
|
|
|
|
// trace-pc w/o func/bb/edge implies edge.
|
|
if (!(CoverageFeatures & InsertionPointTypes)) {
|
|
if (CoverageFeatures &
|
|
(CoverageTracePC | CoverageTracePCGuard | CoverageInline8bitCounters))
|
|
CoverageFeatures |= CoverageEdge;
|
|
|
|
if (CoverageFeatures & CoverageStackDepth)
|
|
CoverageFeatures |= CoverageFunc;
|
|
}
|
|
|
|
SharedRuntime =
|
|
Args.hasFlag(options::OPT_shared_libsan, options::OPT_static_libsan,
|
|
TC.getTriple().isAndroid() || TC.getTriple().isOSFuchsia() ||
|
|
TC.getTriple().isOSDarwin());
|
|
|
|
ImplicitCfiRuntime = TC.getTriple().isAndroid();
|
|
|
|
if (AllAddedKinds & SanitizerKind::Address) {
|
|
NeedPIE |= TC.getTriple().isOSFuchsia();
|
|
if (Arg *A =
|
|
Args.getLastArg(options::OPT_fsanitize_address_field_padding)) {
|
|
StringRef S = A->getValue();
|
|
// Legal values are 0 and 1, 2, but in future we may add more levels.
|
|
if (S.getAsInteger(0, AsanFieldPadding) || AsanFieldPadding < 0 ||
|
|
AsanFieldPadding > 2) {
|
|
D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
|
|
}
|
|
}
|
|
|
|
if (Arg *WindowsDebugRTArg =
|
|
Args.getLastArg(options::OPT__SLASH_MTd, options::OPT__SLASH_MT,
|
|
options::OPT__SLASH_MDd, options::OPT__SLASH_MD,
|
|
options::OPT__SLASH_LDd, options::OPT__SLASH_LD)) {
|
|
switch (WindowsDebugRTArg->getOption().getID()) {
|
|
case options::OPT__SLASH_MTd:
|
|
case options::OPT__SLASH_MDd:
|
|
case options::OPT__SLASH_LDd:
|
|
D.Diag(clang::diag::err_drv_argument_not_allowed_with)
|
|
<< WindowsDebugRTArg->getAsString(Args)
|
|
<< lastArgumentForMask(D, Args, SanitizerKind::Address);
|
|
D.Diag(clang::diag::note_drv_address_sanitizer_debug_runtime);
|
|
}
|
|
}
|
|
|
|
AsanUseAfterScope = Args.hasFlag(
|
|
options::OPT_fsanitize_address_use_after_scope,
|
|
options::OPT_fno_sanitize_address_use_after_scope, AsanUseAfterScope);
|
|
|
|
AsanPoisonCustomArrayCookie = Args.hasFlag(
|
|
options::OPT_fsanitize_address_poison_custom_array_cookie,
|
|
options::OPT_fno_sanitize_address_poison_custom_array_cookie,
|
|
AsanPoisonCustomArrayCookie);
|
|
|
|
// As a workaround for a bug in gold 2.26 and earlier, dead stripping of
|
|
// globals in ASan is disabled by default on ELF targets.
|
|
// See https://sourceware.org/bugzilla/show_bug.cgi?id=19002
|
|
AsanGlobalsDeadStripping =
|
|
!TC.getTriple().isOSBinFormatELF() || TC.getTriple().isOSFuchsia() ||
|
|
Args.hasArg(options::OPT_fsanitize_address_globals_dead_stripping);
|
|
|
|
AsanUseOdrIndicator =
|
|
Args.hasFlag(options::OPT_fsanitize_address_use_odr_indicator,
|
|
options::OPT_fno_sanitize_address_use_odr_indicator,
|
|
AsanUseOdrIndicator);
|
|
} else {
|
|
AsanUseAfterScope = false;
|
|
}
|
|
|
|
if (AllAddedKinds & SanitizerKind::HWAddress) {
|
|
if (Arg *HwasanAbiArg =
|
|
Args.getLastArg(options::OPT_fsanitize_hwaddress_abi_EQ)) {
|
|
HwasanAbi = HwasanAbiArg->getValue();
|
|
if (HwasanAbi != "platform" && HwasanAbi != "interceptor")
|
|
D.Diag(clang::diag::err_drv_invalid_value)
|
|
<< HwasanAbiArg->getAsString(Args) << HwasanAbi;
|
|
} else {
|
|
HwasanAbi = "interceptor";
|
|
}
|
|
}
|
|
|
|
if (AllAddedKinds & SanitizerKind::SafeStack) {
|
|
// SafeStack runtime is built into the system on Fuchsia.
|
|
SafeStackRuntime = !TC.getTriple().isOSFuchsia();
|
|
}
|
|
|
|
// Parse -link-cxx-sanitizer flag.
|
|
LinkCXXRuntimes =
|
|
Args.hasArg(options::OPT_fsanitize_link_cxx_runtime) || D.CCCIsCXX();
|
|
|
|
// Finally, initialize the set of available and recoverable sanitizers.
|
|
Sanitizers.Mask |= Kinds;
|
|
RecoverableSanitizers.Mask |= RecoverableKinds;
|
|
TrapSanitizers.Mask |= TrappingKinds;
|
|
assert(!(RecoverableKinds & TrappingKinds) &&
|
|
"Overlap between recoverable and trapping sanitizers");
|
|
}
|
|
|
|
static std::string toString(const clang::SanitizerSet &Sanitizers) {
|
|
std::string Res;
|
|
#define SANITIZER(NAME, ID) \
|
|
if (Sanitizers.has(SanitizerKind::ID)) { \
|
|
if (!Res.empty()) \
|
|
Res += ","; \
|
|
Res += NAME; \
|
|
}
|
|
#include "clang/Basic/Sanitizers.def"
|
|
return Res;
|
|
}
|
|
|
|
static void addIncludeLinkerOption(const ToolChain &TC,
|
|
const llvm::opt::ArgList &Args,
|
|
llvm::opt::ArgStringList &CmdArgs,
|
|
StringRef SymbolName) {
|
|
SmallString<64> LinkerOptionFlag;
|
|
LinkerOptionFlag = "--linker-option=/include:";
|
|
if (TC.getTriple().getArch() == llvm::Triple::x86) {
|
|
// Win32 mangles C function names with a '_' prefix.
|
|
LinkerOptionFlag += '_';
|
|
}
|
|
LinkerOptionFlag += SymbolName;
|
|
CmdArgs.push_back(Args.MakeArgString(LinkerOptionFlag));
|
|
}
|
|
|
|
void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
|
|
llvm::opt::ArgStringList &CmdArgs,
|
|
types::ID InputType) const {
|
|
// NVPTX doesn't currently support sanitizers. Bailing out here means that
|
|
// e.g. -fsanitize=address applies only to host code, which is what we want
|
|
// for now.
|
|
if (TC.getTriple().isNVPTX())
|
|
return;
|
|
|
|
// Translate available CoverageFeatures to corresponding clang-cc1 flags.
|
|
// Do it even if Sanitizers.empty() since some forms of coverage don't require
|
|
// sanitizers.
|
|
std::pair<int, const char *> CoverageFlags[] = {
|
|
std::make_pair(CoverageFunc, "-fsanitize-coverage-type=1"),
|
|
std::make_pair(CoverageBB, "-fsanitize-coverage-type=2"),
|
|
std::make_pair(CoverageEdge, "-fsanitize-coverage-type=3"),
|
|
std::make_pair(CoverageIndirCall, "-fsanitize-coverage-indirect-calls"),
|
|
std::make_pair(CoverageTraceBB, "-fsanitize-coverage-trace-bb"),
|
|
std::make_pair(CoverageTraceCmp, "-fsanitize-coverage-trace-cmp"),
|
|
std::make_pair(CoverageTraceDiv, "-fsanitize-coverage-trace-div"),
|
|
std::make_pair(CoverageTraceGep, "-fsanitize-coverage-trace-gep"),
|
|
std::make_pair(Coverage8bitCounters, "-fsanitize-coverage-8bit-counters"),
|
|
std::make_pair(CoverageTracePC, "-fsanitize-coverage-trace-pc"),
|
|
std::make_pair(CoverageTracePCGuard, "-fsanitize-coverage-trace-pc-guard"),
|
|
std::make_pair(CoverageInline8bitCounters, "-fsanitize-coverage-inline-8bit-counters"),
|
|
std::make_pair(CoveragePCTable, "-fsanitize-coverage-pc-table"),
|
|
std::make_pair(CoverageNoPrune, "-fsanitize-coverage-no-prune"),
|
|
std::make_pair(CoverageStackDepth, "-fsanitize-coverage-stack-depth")};
|
|
for (auto F : CoverageFlags) {
|
|
if (CoverageFeatures & F.first)
|
|
CmdArgs.push_back(F.second);
|
|
}
|
|
|
|
if (TC.getTriple().isOSWindows() && needsUbsanRt()) {
|
|
// Instruct the code generator to embed linker directives in the object file
|
|
// that cause the required runtime libraries to be linked.
|
|
CmdArgs.push_back(Args.MakeArgString(
|
|
"--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone")));
|
|
if (types::isCXX(InputType))
|
|
CmdArgs.push_back(Args.MakeArgString(
|
|
"--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone_cxx")));
|
|
}
|
|
if (TC.getTriple().isOSWindows() && needsStatsRt()) {
|
|
CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
|
|
TC.getCompilerRT(Args, "stats_client")));
|
|
|
|
// The main executable must export the stats runtime.
|
|
// FIXME: Only exporting from the main executable (e.g. based on whether the
|
|
// translation unit defines main()) would save a little space, but having
|
|
// multiple copies of the runtime shouldn't hurt.
|
|
CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
|
|
TC.getCompilerRT(Args, "stats")));
|
|
addIncludeLinkerOption(TC, Args, CmdArgs, "__sanitizer_stats_register");
|
|
}
|
|
|
|
if (Sanitizers.empty())
|
|
return;
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize=" + toString(Sanitizers)));
|
|
|
|
if (!RecoverableSanitizers.empty())
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize-recover=" +
|
|
toString(RecoverableSanitizers)));
|
|
|
|
if (!TrapSanitizers.empty())
|
|
CmdArgs.push_back(
|
|
Args.MakeArgString("-fsanitize-trap=" + toString(TrapSanitizers)));
|
|
|
|
for (const auto &BLPath : BlacklistFiles) {
|
|
SmallString<64> BlacklistOpt("-fsanitize-blacklist=");
|
|
BlacklistOpt += BLPath;
|
|
CmdArgs.push_back(Args.MakeArgString(BlacklistOpt));
|
|
}
|
|
for (const auto &Dep : ExtraDeps) {
|
|
SmallString<64> ExtraDepOpt("-fdepfile-entry=");
|
|
ExtraDepOpt += Dep;
|
|
CmdArgs.push_back(Args.MakeArgString(ExtraDepOpt));
|
|
}
|
|
|
|
if (MsanTrackOrigins)
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize-memory-track-origins=" +
|
|
Twine(MsanTrackOrigins)));
|
|
|
|
if (MsanUseAfterDtor)
|
|
CmdArgs.push_back("-fsanitize-memory-use-after-dtor");
|
|
|
|
// FIXME: Pass these parameters as function attributes, not as -llvm flags.
|
|
if (!TsanMemoryAccess) {
|
|
CmdArgs.push_back("-mllvm");
|
|
CmdArgs.push_back("-tsan-instrument-memory-accesses=0");
|
|
CmdArgs.push_back("-mllvm");
|
|
CmdArgs.push_back("-tsan-instrument-memintrinsics=0");
|
|
}
|
|
if (!TsanFuncEntryExit) {
|
|
CmdArgs.push_back("-mllvm");
|
|
CmdArgs.push_back("-tsan-instrument-func-entry-exit=0");
|
|
}
|
|
if (!TsanAtomics) {
|
|
CmdArgs.push_back("-mllvm");
|
|
CmdArgs.push_back("-tsan-instrument-atomics=0");
|
|
}
|
|
|
|
if (CfiCrossDso)
|
|
CmdArgs.push_back("-fsanitize-cfi-cross-dso");
|
|
|
|
if (CfiICallGeneralizePointers)
|
|
CmdArgs.push_back("-fsanitize-cfi-icall-generalize-pointers");
|
|
|
|
if (Stats)
|
|
CmdArgs.push_back("-fsanitize-stats");
|
|
|
|
if (MinimalRuntime)
|
|
CmdArgs.push_back("-fsanitize-minimal-runtime");
|
|
|
|
if (AsanFieldPadding)
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-field-padding=" +
|
|
Twine(AsanFieldPadding)));
|
|
|
|
if (AsanUseAfterScope)
|
|
CmdArgs.push_back("-fsanitize-address-use-after-scope");
|
|
|
|
if (AsanPoisonCustomArrayCookie)
|
|
CmdArgs.push_back("-fsanitize-address-poison-custom-array-cookie");
|
|
|
|
if (AsanGlobalsDeadStripping)
|
|
CmdArgs.push_back("-fsanitize-address-globals-dead-stripping");
|
|
|
|
if (AsanUseOdrIndicator)
|
|
CmdArgs.push_back("-fsanitize-address-use-odr-indicator");
|
|
|
|
if (!HwasanAbi.empty()) {
|
|
CmdArgs.push_back("-default-function-attr");
|
|
CmdArgs.push_back(Args.MakeArgString("hwasan-abi=" + HwasanAbi));
|
|
}
|
|
|
|
// MSan: Workaround for PR16386.
|
|
// ASan: This is mainly to help LSan with cases such as
|
|
// https://github.com/google/sanitizers/issues/373
|
|
// We can't make this conditional on -fsanitize=leak, as that flag shouldn't
|
|
// affect compilation.
|
|
if (Sanitizers.has(SanitizerKind::Memory) ||
|
|
Sanitizers.has(SanitizerKind::Address))
|
|
CmdArgs.push_back("-fno-assume-sane-operator-new");
|
|
|
|
// Require -fvisibility= flag on non-Windows when compiling if vptr CFI is
|
|
// enabled.
|
|
if (Sanitizers.hasOneOf(CFIClasses) && !TC.getTriple().isOSWindows() &&
|
|
!Args.hasArg(options::OPT_fvisibility_EQ)) {
|
|
TC.getDriver().Diag(clang::diag::err_drv_argument_only_allowed_with)
|
|
<< lastArgumentForMask(TC.getDriver(), Args,
|
|
Sanitizers.Mask & CFIClasses)
|
|
<< "-fvisibility=";
|
|
}
|
|
}
|
|
|
|
SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
|
|
bool DiagnoseErrors) {
|
|
assert((A->getOption().matches(options::OPT_fsanitize_EQ) ||
|
|
A->getOption().matches(options::OPT_fno_sanitize_EQ) ||
|
|
A->getOption().matches(options::OPT_fsanitize_recover_EQ) ||
|
|
A->getOption().matches(options::OPT_fno_sanitize_recover_EQ) ||
|
|
A->getOption().matches(options::OPT_fsanitize_trap_EQ) ||
|
|
A->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) &&
|
|
"Invalid argument in parseArgValues!");
|
|
SanitizerMask Kinds;
|
|
for (int i = 0, n = A->getNumValues(); i != n; ++i) {
|
|
const char *Value = A->getValue(i);
|
|
SanitizerMask Kind;
|
|
// Special case: don't accept -fsanitize=all.
|
|
if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
|
|
0 == strcmp("all", Value))
|
|
Kind = SanitizerMask();
|
|
else
|
|
Kind = parseSanitizerValue(Value, /*AllowGroups=*/true);
|
|
|
|
if (Kind)
|
|
Kinds |= Kind;
|
|
else if (DiagnoseErrors)
|
|
D.Diag(clang::diag::err_drv_unsupported_option_argument)
|
|
<< A->getOption().getName() << Value;
|
|
}
|
|
return Kinds;
|
|
}
|
|
|
|
int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A) {
|
|
assert(A->getOption().matches(options::OPT_fsanitize_coverage) ||
|
|
A->getOption().matches(options::OPT_fno_sanitize_coverage));
|
|
int Features = 0;
|
|
for (int i = 0, n = A->getNumValues(); i != n; ++i) {
|
|
const char *Value = A->getValue(i);
|
|
int F = llvm::StringSwitch<int>(Value)
|
|
.Case("func", CoverageFunc)
|
|
.Case("bb", CoverageBB)
|
|
.Case("edge", CoverageEdge)
|
|
.Case("indirect-calls", CoverageIndirCall)
|
|
.Case("trace-bb", CoverageTraceBB)
|
|
.Case("trace-cmp", CoverageTraceCmp)
|
|
.Case("trace-div", CoverageTraceDiv)
|
|
.Case("trace-gep", CoverageTraceGep)
|
|
.Case("8bit-counters", Coverage8bitCounters)
|
|
.Case("trace-pc", CoverageTracePC)
|
|
.Case("trace-pc-guard", CoverageTracePCGuard)
|
|
.Case("no-prune", CoverageNoPrune)
|
|
.Case("inline-8bit-counters", CoverageInline8bitCounters)
|
|
.Case("pc-table", CoveragePCTable)
|
|
.Case("stack-depth", CoverageStackDepth)
|
|
.Default(0);
|
|
if (F == 0)
|
|
D.Diag(clang::diag::err_drv_unsupported_option_argument)
|
|
<< A->getOption().getName() << Value;
|
|
Features |= F;
|
|
}
|
|
return Features;
|
|
}
|
|
|
|
std::string lastArgumentForMask(const Driver &D, const llvm::opt::ArgList &Args,
|
|
SanitizerMask Mask) {
|
|
for (llvm::opt::ArgList::const_reverse_iterator I = Args.rbegin(),
|
|
E = Args.rend();
|
|
I != E; ++I) {
|
|
const auto *Arg = *I;
|
|
if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
|
|
SanitizerMask AddKinds =
|
|
expandSanitizerGroups(parseArgValues(D, Arg, false));
|
|
if (AddKinds & Mask)
|
|
return describeSanitizeArg(Arg, Mask);
|
|
} else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
|
|
SanitizerMask RemoveKinds =
|
|
expandSanitizerGroups(parseArgValues(D, Arg, false));
|
|
Mask &= ~RemoveKinds;
|
|
}
|
|
}
|
|
llvm_unreachable("arg list didn't provide expected value");
|
|
}
|
|
|
|
std::string describeSanitizeArg(const llvm::opt::Arg *A, SanitizerMask Mask) {
|
|
assert(A->getOption().matches(options::OPT_fsanitize_EQ)
|
|
&& "Invalid argument in describeSanitizerArg!");
|
|
|
|
std::string Sanitizers;
|
|
for (int i = 0, n = A->getNumValues(); i != n; ++i) {
|
|
if (expandSanitizerGroups(
|
|
parseSanitizerValue(A->getValue(i), /*AllowGroups=*/true)) &
|
|
Mask) {
|
|
if (!Sanitizers.empty())
|
|
Sanitizers += ",";
|
|
Sanitizers += A->getValue(i);
|
|
}
|
|
}
|
|
|
|
assert(!Sanitizers.empty() && "arg didn't provide expected value");
|
|
return "-fsanitize=" + Sanitizers;
|
|
}
|